Changes

*Songbirds have a complex set of syringeal muscles

*Songbirds have a complex set of syringeal muscles

*Sexual dimorphisms occurs in songbirds, with the males of the species usually producing a more complex birdsong

*Sexual dimorphisms occurs in songbirds, with the males of the species usually producing a more complex birdsong, which directly relates to the size of the area of the brain responsible for song

*Parrots have a thick [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] which allows them to make sounds similar to humans  

*Parrots have a thick [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] which allows them to make sounds similar to humans  

**Sound travels from the syrinx and is modified in the throat, [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] and mouth

 

*Sound travels from the syrinx and is modified in the throat, [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] and mouth in parrots